Trolley.



R. C. KISSINGEPI.

TROLLEY.

APPLICATION man 9m26.191s.

l 996@ miente@ Nom 27, MRA

nozsnzar c. Krsslnenn, or DAYTON, onro.

TROLLEY.

Specification of Letters Patent.

Patented N ov. 2r?, 191'?.

Application led. December 26, 1916. Serial No. 139,009.

To 'all 'whom t may concern.'

Be it known that I, ROBERT C. Krssnvcnn, citizen of the United States7residing at Daytom in the county of Montgomery 'and State of Ohio, haveinvented certain new and useful Improvements in Trolleys, of which thefollowing is a specification.

My invention relates to electrically propelled vehicles and particularlyto improvements in trolleys for electric traction cars.

The object of the invention is to simplify the structure as well as themeans and mode of operation of such devices whereby they will not onlybe cheapened in construction but will be more efficient in use, easilyengaged with and disengaged from the trolley harp,rof maximum durabilityand unlikely to get out of repair.

Further objects of the invention are to provide improved means forelectrically connecting the trolley wheel with the harp ini dependent ofthe trunnion or shaft, where-by any tendency of the current to arc andthereby burn the bearing is obviated.

A further object is to provide means for automatically taking up theside play to prevent rattle or chatter of the wheel and to provideimproved means for securing the wheel within the harp .together withimproved lubricating means therefor. Y

With the above primary and other inci dental objects in view, as willmore fully appear in the specification7 the invention consists of thefeatures of construction, the parts and combinations thereof, and themode of operation or their equivalents, as hereinafter described and setforth in the claims.

Referring to the drawings, Figure 1 is a side elevation of the assembleddevice. Fig. 2 is a detail sectional view thereof. Fig. 3 is a sideelevation of the wheel and contact spring removed from the harp. Fig. 4is a detail perspective view of the contact spring. Fig. 5 is a detailside view of one arm of the trolley harp.

Like parts are Vindicated by similar characters of reference throughoutthe several views.

In the drawings7 1 is the trolley wheel revolubly supported within theharp 2 which is carried upon the end of the trolley pole 3 in the usualmanner. The wheel isprovided with the usual peripheral 4groove 4 havingangular sides within which the trolley wire or cable is engaged. In thepresent instance the wheel is provided with an enlarged hollow hub 5,the recessed interior of which forms a reservoir 6 for lubricatingmaterial. Within the hub 5 there is located a bushing 7 which maybe ofany suitable material or construction. There are at present upon themarket numerous anti-friction bearings or bushings any of which may beutilized in the present construction. In the drawings there has beenshown a simple form of metallic bushing having ducts or ports 8 throughwhich the lubricant is admitted to the shaft or trunnion 9.

The shaft or trunnion 9 is screw threaded at its opposite ends as at 1()for the reception of retaining nuts 11. The screw threaded ends of thetrunnion or shaft are fiattened on their opposite sides as at 12 forengagement within the slotted extremities of the harp 2.

The harp 2 comprises the usual sleeve 13 within which the pole 3projects and from the upper end of which extend the parallel spaced arms14. The arms 14 are slotted or bifurcated at their extremities as shownat 15 for the reception of the fiattened extremities 12 of the shaft ortrunnion 9.

On the outer faces of the arms 14 there are formed pockets or recesses16 concentric with the shaft or trunnion 9 when engaged within thebifurcated extremities of the arm. The pockets or recesses 16 correspondin size with the retaining nuts 11. The construction is such that whenthe retaining nuts 11 are in place upon the shaft or trunnion they areinclosed within the recesses or pockets 16 as shown in Figs. 1 and 2 andbeing of greater diameter than the width of the slot 15 they prevent thedisengagement of the trunnion or shaft from within the bifurcations ofthe arms. Thus it will be seen that the trunnion is not held inengagement with the arms by the friction or clamping action of the nuts11 but by engagement of said nuts within the recesses or pockets 16.

Located in the lateral faces of the hub 5 are concentric grooves orchannels 17 in which are located helical contact springs 18. Thesecontact springs are of peculiar formation, the coils being attenedtransversely to the axis of the spring as shown in detail in Fig. 4.Thus the springs have the ap pearance of a flat bar or strip of materialcoiled edgewise. The springs 18 are compressed within the channels orgrooves 17 y provided.

intermediate the hub 5 of the Wheel and the inner faces of the arms 14of the harp. The harp arms 14k are provided With disklike heads 19against which the Contact springs 18 bear. springs 18 are bent at rightangles as shown at 20 for engagement With the Slot 0r bifurcation 15 ofthe arms to hold the springs against rotation in unison with the Wheel.The resiliency of the springs 18 holds such 'springs firmly in contactWith both the Wheel and the harp While permitting the Wheel to rotateindependent thereof.

lLubricating ducts or ports 21 leadv from thev reservoir G to thechannels or grooves 17 to provide lubrication for the bearings of thesprings 18 upon the bottoms of the grooves or channels 17. The reservoir6 is charged With lubricant through an opening provided With a suitableclosure screW 22. The construction is such that current Will pass fromthe trolley Wire or cable through the Wheel and thence through theContact springs 18 to the harp, thus providing a path for the currentindependent of the shaft or trunnion 9. The springs 18 Will maintainuniform contact With the Wheel at all times, any variation of the Wheeland harp being compensated for by the resiliency of the springs. Thesprings, being located upon opposite sides of the Wheel, balance oneanother and prevent any side play or chatter of the Wheel. It has beenfound in practice that When the current is conducted from the Wheelthrough the trunnion or shaft to the harp, as the Wheel Wears andbecomes more or less loose upon its bearings there is a tendency'for thecurrent to arc intermediate the Wheel and shaft thereby carbonizing thelubricant and burning the bearings causing the Wheel and shaft to Wearout very rapidly. This difficulty is obviated in the present instance byproviding a path for the current from the Wheel to the harp separate andindependent ofthe shaft or trunnion. The peculiar formvof the helicalspring provides a Wide fiat bearing of the spring upon both the Wheeland the harp, insuring perfectk contact and reducing the Wear of theparts to a minimum. The WearingV of the parts is further minimized bythe lubrication of the spring bearings as described.

To insure the uniform distribution of the lubricant throughout thelength of the shaft,

the longitudinal groove or depression 23 is The shaft or trunnion'S) isprevented from rotating by the engagement of its ia't extremities l12Within the slotted eX- tremities 15 of the harp 5.` The Wheel is readilydisengaged from the harp by loosening the nut-s 11 and pulling the Wheeland shaft or trunnion from the harp through theslots 15. This permitsthe Wheel to be easily and quickly removed or replaced.

The outer ends of the vdipole, While adjacent thereto a shoulder 26 Tosecure t-he harp upon the trolley pole 3 there are provided set screws24 one of which carries at its end projecting stud 25 to engage in ahole in the side of the trolley bears upon t-he material around the holein Which the stud is engaged, to clamp the pole in position. vThus theharp and pole are interengaged not only by the clamping action of theset screW butby the projection of the stud into the opening of thepole.It is to be noted that the flange forming the pocket 16 is beveled onits outer face, and that the harp is provided With a rib 27 extendingflush with the top of the pocket. The nuts 11 being seated `flush Withthe top of thepocket Will not afford a place for the cable to lodge inevent the Wheel is thrown off the cable. In such case the cable isguided past the nuts 11 by the rib 27.

` From the above description'it Will be apparent that there is thusprovided a device of the character described `possessing Vthe particularfeatures of advantage before enumerated as desirable but Which obviouslyis susceptible of modification in its form, proportion, detailconstruction,V or arrangement of parts, Without departing from theprinciple involved or sacrificing vantages. Y

Vhile in order to comply With the statute the invention has beendescribed in language more or less specific as to certain structuralfeatures, it is tov be, understood that the invention is not limited toany specific details but that the Ameans and construction hereindescribed comprise but one mode of putting the invention into effect andthe invention is therefore claimed broadly in any of its possible formsor modifications Within the scope of the appended claims."

VHaving thus described my invention, I claim :f j

1. A trolley Wheel, a shaft therefor having flattened portionsadjacentits 'opposite ends, a trolley harp having open ended slots inthe arms thereof in Which therflattened portions of the shaft are heldagainst rotation, said harp having pockets formed in the arms andintersected by said slots, and retaining nuts engaging the shaft andseated Within said pockets.

2.-A trolley ,Wheel, a shaft therefor, a

any of its adtrolley harp With the arms of Which the shaft isinterlocked against rotation, `and having lpockets formed thereon intoWhich the extremities of the shaft project, and collars engaging theshaft ends and contacting the-peripheral Walls of the pockets to holdthe` shaft against lateral movement.

3. A trolley Wheel,a shaft therefor having flattened faces, atrolleyharp having slots formed inthe armsthereof-in Which the iiattenedportions of the shaft engage to hold said shaft againstrotation, Handmeans for preventing sliding movement of the shaft in said slots.

4. A trolley Wheel, a shaft therefor, retaining nuts therefor, a trolleyharp having slots and pockets in the arms thereof, Said slots serving tointerlock the shaft With the arms against rotation independent ot theretaining nuts which are seated in the pockets of the harp arms.

5. A trolley Wheel, a shaft therefor, retaining nuts for the shaft, 4atrolley harp the arms of which are provided With pockets in which theshaft nuts are seated, and

having slots for holding the shaft against rotation independent of theretaining nuts, the shaft being held against lateral movement by theengagement of the edges of the nuts With the Walls of the pockets.

In testimony whereof, I have hereunto set my hand this 16th day ofSeptember A. D. 1916.

ROBERT C. KISSINGER.

Vitnesses:

EDWARD E. DUNCAN, H. L. WALKER.

" Copies o this patent may be obtained for five cents each, byaddressing the "Commissioner of Patents,

` Y Washington, D. C.

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